package com.heima.wemedia.service.impl;

import com.alibaba.fastjson.JSON;
import com.baomidou.mybatisplus.core.conditions.Wrapper;
import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.baomidou.mybatisplus.core.toolkit.Wrappers;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.heima.common.constants.WemediaConstants;
import com.heima.common.exception.CustomException;
import com.heima.model.common.dtos.PageResponseResult;
import com.heima.model.common.dtos.ResponseResult;
import com.heima.model.common.enums.AppHttpCodeEnum;
import com.heima.model.wemedia.dtos.WmNewsDto;
import com.heima.model.wemedia.dtos.WmNewsPageReqDto;
import com.heima.model.wemedia.pojos.WmMaterial;
import com.heima.model.wemedia.pojos.WmNews;
import com.heima.model.wemedia.pojos.WmNewsMaterial;
import com.heima.utils.threadlcoal.WmThreadLocalUtil;
import com.heima.wemedia.mapper.WmMaterialMapper;
import com.heima.wemedia.mapper.WmNewsMapper;
import com.heima.wemedia.mapper.WmNewsMaterialMapper;
import com.heima.wemedia.service.WmNewsAutoScanService;
import com.heima.wemedia.service.WmNewsService;
import com.sun.javafx.collections.MappingChange;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.util.StringUtils;

import java.util.ArrayList;
import java.util.Date;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

@Service
@Slf4j
public class WmNewsServiceImpl extends ServiceImpl<WmNewsMapper, WmNews> implements WmNewsService {
    @Autowired
    private WmNewsMaterialMapper wmNewsMaterialMapper;
    @Autowired
    private WmMaterialMapper wmMaterialMapper;
    @Autowired
    private WmNewsMapper wmNewsMapper;
    @Autowired
    private WmNewsAutoScanService wmNewsAutoScanService;
    @Override
    public ResponseResult findAll(WmNewsPageReqDto dto) {
        if(StringUtils.isEmpty(dto)){
            return ResponseResult.errorResult(AppHttpCodeEnum.PARAM_INVALID);
        }
//        获取当前登录人信息
        Integer userId = WmThreadLocalUtil.getUser().getId();
//        分页查询
        Page<WmNews> page = new Page<>(dto.getPage(), dto.getSize());
        LambdaQueryWrapper<WmNews> lqw = new LambdaQueryWrapper<>();
        //状态精确查询
        if(dto.getStatus()!=null){
            lqw.eq(WmNews::getStatus,dto.getStatus());
        }
        //频道精确查询
        if(dto.getChannelId()!=null){
            lqw.eq(WmNews::getChannelId,dto.getChannelId());
        }
        //时间范围查询
        if(dto.getBeginPubDate()!=null&&dto.getEndPubDate()!=null){
            lqw.between(WmNews::getPublishTime,dto.getBeginPubDate(),dto.getEndPubDate());
        }
        //关键字模糊查询
        if(!StringUtils.isEmpty(dto.getKeyword())){
            lqw.like(WmNews::getTitle,dto.getKeyword());
        }
        //查询当前登录用户的文章
        lqw.eq(WmNews::getUserId,userId);
        //发布时间倒序查询
        lqw.orderByDesc(WmNews::getCreatedTime);

       page = page(page, lqw);

        PageResponseResult responseResult = new PageResponseResult(dto.getPage(), dto.getSize(), (int) page.getTotal());
        responseResult.setData(page.getRecords());

        return responseResult;
    }
    /**
     *  发布文章或保存草稿
     * @param dto
     * @return
     */
    @Override
    public ResponseResult submitNews(WmNewsDto dto) {
//        校验参数
        if(StringUtils.isEmpty(dto)&&dto.getContent()==null){
            return ResponseResult.errorResult(AppHttpCodeEnum.PARAM_INVALID);
        }
//        保存文章或者修改文章
        WmNews wmNews = new WmNews();
        //属性拷贝 属性名词和类型相同才能拷贝
        BeanUtils.copyProperties(dto,wmNews);
        //封面图片  list---> string
        if(dto.getImages()!=null&&dto.getImages().size()>0){
            //[1dddfsd.jpg,sdlfjldk.jpg]-->   1dddfsd.jpg,sdlfjldk.jpg
            String join = org.apache.commons.lang3.StringUtils.join(dto.getImages(), ",");
            wmNews.setImages(join);
        }
        //如果当前封面类型为自动 -1
        if(dto.getType().equals(WemediaConstants.WM_NEWS_TYPE_AUTO)){
            wmNews.setType(null);
        }
        saveOrUpdateWmNews(wmNews);
        //2.判断是否为草稿  如果为草稿结束当前方法
        if(dto.getStatus().equals(WmNews.Status.NORMAL.getCode())){
            return ResponseResult.okResult(AppHttpCodeEnum.SUCCESS);
        }
        //3.不是草稿，保存文章内容图片与素材的关系
        //获取到文章内容中的图片信息
        List<String> materials =  ectractUrlInfo(dto.getContent());
        saveRelativeInfoForContent(materials,wmNews.getId());
        //4.不是草稿，保存文章封面图片与素材的关系，如果当前布局是自动，需要匹配封面图片
        saveRelativeInfoForCover(dto,wmNews,materials);
//        审核文章
        wmNewsAutoScanService.autoScanWmNews(wmNews.getId());

        return ResponseResult.okResult(AppHttpCodeEnum.SUCCESS);
    }


    /**
     * 第一个功能：如果当前封面类型为自动，则设置封面类型的数据
     * 匹配规则：
     * 1，如果内容图片大于等于1，小于3  单图  type 1
     * 2，如果内容图片大于等于3  多图  type 3
     * 3，如果内容没有图片，无图  type 0
     *
     * 第二个功能：保存封面图片与素材的关系
     * @param dto
     * @param wmNews
     * @param materials
     */
    private void saveRelativeInfoForCover(WmNewsDto dto, WmNews wmNews, List<String> materials) {
        List<String> images = dto.getImages();
        //如果当前封面类型为自动，则设置封面类型的数据
        if(dto.getType().equals(WemediaConstants.WM_NEWS_TYPE_AUTO)){
//            多图
            if(materials.size()==3){
                wmNews.setType(WemediaConstants.WM_NEWS_MANY_IMAGE);
               images = materials.stream().limit(3).collect(Collectors.toList());
            }
            else if(materials.size()>=1&&materials.size()<3){
//                单图
                wmNews.setType(WemediaConstants.WM_NEWS_SINGLE_IMAGE);
                images = materials.stream().limit(1).collect(Collectors.toList());

            }
            else {
//                无图
                wmNews.setType(WemediaConstants.WM_NEWS_NONE_IMAGE);
            }
//            修改文章
            if(images!=null&&images.size()>0){
                wmNews.setImages(org.apache.commons.lang3.StringUtils.join(images,","));
            }
            updateById(wmNews);
        }
        if(images != null && images.size() > 0){
            saveRelativeInfo(images,wmNews.getId(),WemediaConstants.WM_COVER_REFERENCE);
        }
    }

    /**
     * 处理文章内容图片与素材的关系
     * @param materials
     * @param newsId
     */
    private void saveRelativeInfoForContent(List<String> materials, Integer newsId) {
        saveRelativeInfo(materials,newsId,WemediaConstants.WM_CONTENT_REFERENCE);
    }
    /**
     * 保存文章图片与素材的关系到数据库中
     * @param materials
     * @param newsId
     * @param type
     */
    private void saveRelativeInfo(List<String> materials, Integer newsId, Short type) {
        if(materials!=null&&!materials.isEmpty()){
//            根据图片的URL查询素材id
            List<WmMaterial> materials1 = wmMaterialMapper.selectList(Wrappers
                    .<WmMaterial>lambdaQuery().in(WmMaterial::getUrl, materials));
//            判断素材是否有效
            if(materials1==null||materials1.size()==0){
                //手动抛出异常   第一个功能：能够提示调用者素材失效了，第二个功能，进行数据的回滚
                throw new CustomException(AppHttpCodeEnum.PARAM_IMAGE_FORMAT_ERROR);
            }
            if(materials1.size()!=materials.size()){
                throw new CustomException(AppHttpCodeEnum.PARAM_IMAGE_FORMAT_ERROR);
            }
            List<Integer> collect = materials1.stream().map(WmMaterial::getId).collect(Collectors.toList());
//            批量保存
            wmNewsMaterialMapper.saveRelations(collect,newsId,type);
        }

    }

    /**
     * 提取文章内容中的图片信息
     * @param content
     * @return
     */
    private List<String> ectractUrlInfo(String content) {
        ArrayList<String> list = new ArrayList<>();
        List<Map> maps = JSON.parseArray(content, Map.class);
        for (Map map : maps) {
            if(map.get("type").equals("images")){
                String imgUrl = (String) map.get("value");
                list.add(imgUrl);
            }
        }
        return list;

    }

    /**
     * 保存和修改文章
     * @param wmNews
     */
    private void saveOrUpdateWmNews(WmNews wmNews) {
    wmNews.setUserId(WmThreadLocalUtil.getUser().getId());
    wmNews.setCreatedTime(new Date());
    wmNews.setSubmitedTime(new Date());
    wmNews.setEnable((short)1); //默认上架
        if(wmNews.getId()==null){
//            保存
            save(wmNews);
        }else {
            wmNewsMaterialMapper.delete(Wrappers.<WmNewsMaterial>lambdaQuery().eq(WmNewsMaterial::getNewsId,wmNews.getId()));
            updateById(wmNews);
        }
    }

}
